# (i) Find the principal value of (ii) Prove that cos^-1 (√3/2)

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(i) Find the principal value of (ii) Prove that cos-1($\frac{\sqrt3}{2}$)

(ii) Prove that 2 sin-1($\frac{3}{5}$) = tan-1 ($\frac{24}{7}$)

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(i) cos -1 $\frac{\sqrt 3}{2}$ = $\frac{π}{6}$